[Perf] Linux/arm64: 1 Improvement on 7/19/2026 7:43:11 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [13c03a4a9a854291f77636b1e15038e65919e68b](https://github.com/dotnet/runtime/commit/13c03a4a9a854291f77636b1e15038e65919e68b)
Compare | [cb301bc23e682da023cf3c51985d45fbb528e7c3](https://github.com/dotnet/runtime/commit/cb301bc23e682da023cf3c51985d45fbb528e7c3)
Diff | [Diff](https://github.com/dotnet/runtime/compare/13c03a4a9a854291f77636b1e15038e65919e68b...cb301bc23e682da023cf3c51985d45fbb528e7c3)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in PerfLabTests.DelegatePerf

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [MulticastDelegateCombineInvoke - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'PerfLabTests.DelegatePerf*'
```

### PerfLabTests.DelegatePerf.MulticastDelegateCombineInvoke

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

Start with src/benchmarks/micro/runtime/perflab/DelegatePerf.cs, especially lines 61-92, then review the linked performance report and baseline/compare commits. Run the provided benchmarks_ci.py command to reproduce the arm64 result. The payload does not identify a requested code change or acceptance test, so completion would require triage to determine whether the measured improvement needs follow-up.

Written by the indexing model from the issue text.